Louise measured the perimeter of her rectangular scrapbook to be 154 cm. if the scrapbook is 45 cm wide, how long is the scrapbook?

The length is 32 cm

Step-by-step explanation:

The scrapbook is rectangular so the perimeter is 2(l+w)

P = 2(l+w)

We know the perimeter is 154 and the width is 45

Substituting these values into the equation

154 = 2 (l+45)

Divide each side by 2

154/2 = 2/2 (l+45)

77 = l+45

Subtract 45 from each side

77-45 = l+45-45

32 = l

The length is 32 cm

when rotating a figure 180 degrees, imagine that you are able to take the figure and turn it clockwise or counterclockwise around a center point. to rotate a figure 180 degrees, you will need to apply the rule (x, y) → (-x, -y). start by using a coordinate grid with coordinates for each vertex of the figure. the center point of the coordinate grid is located at (0, 0), which is what you will rotate the figure around. write down the original coordinates of the shape you are going to rotate. then, apply the rule. for example, coordinate (1, 2) becomes (-1, -2). another example would be, coordinate (-4, -2) becoming (4, 2). after you change each original coordinate to the rotated coordinate, you will draw your new figure.

step-by-step explanation: